I think the best way to identify the runway is by looking ahead through the front window rather being distracted looking to the side at an iPad.
Mind you, I get annoyed when people are looking at their phone when walking down the sidewalk or driving rather than looking where they are going.
It is observed that Pilot monitoring (PM) is generally very busy in EFB for checks (head down) and misses visual clues to lineup on correct RWY. So if Pilot flying (PF) makes error there is no defense available as PM is head down. So i assume checking position on EFB might be useful. What are your suggestion.